Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
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An Organic Transistor-based Electrical Assay for Copper(II) in Water
Yui SASAKITsuyoshi MINAMITsukuru MINAMIKIShizuo TOKITO
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JOURNALS OPEN ACCESS

Volume 85 (2017) Issue 12 Pages 775-778

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Abstract

We herein report an electrical assay for copper(II) (Cu2+) utilizing an organic thin-film transistor (TFT). To endow the metal ion recognition ability, the extended-gate portion in the organic TFT is functionalized by a nitrilotriacetic acid (NTA)-terminated monolayer. As a result, the device responds selectively to Cu2+ in aqueous media. Importantly, the estimated detection limit for Cu2+ (= 96 ppb) is much lower than environmental standard value of a copper contaminant in drinking water. Its superior processability and portability in the organic device indicate that the proposed assay could be applied for on-site detection of the Cu2+ ion without large-sized equipment.

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© 2017 The Electrochemical Society of Japan
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